DoraFactory Hack

TOTAL LOST $42K
Low Other

Summarize with AI

ChatGPT Perplexity Claude Grok
Affected Chain 2021 Incident surface
Recovered - No recovery reported
All-Time Rank #1753 By amount stolen
Auditors 1 Prior security audit

Incident Overview

ChainSwap was cracked by the hacker. DORA tokens on ChainSwap bridges were affected. 7872 DORA tokens were stolen from the ChainSwap bridge smart contract and they were immediately sold on Uniswap.

Most of the tokens were assets owned by the Foundation, and they were used to create cross-chain liquidities.

Incident Report

Protocol / Project DoraFactory
Date of Incident
Attack Technique Other
Classification Other
Primary Source View Post-Mortem

Protocol Information

Protocol Type Farm
Affected Token DORA
Official Website hackerlink.io/
Protocol Twitter/X @DoraFactory
Team Anonymous
Source Code Unverified

What the Attacker Needed to Succeed

Understanding the prerequisites for this type of attack helps auditors identify protocols that are most at risk and helps developers build better defenses.

Technical Knowledge Deep understanding of other and Solidity and EVM internals
Capital Required Seed capital to cover gas and initial position setup
On-Chain Access Ability to interact with smart contracts and deploy a custom exploit contract
Protocol Analysis Identification of the exploitable vulnerability in DoraFactory's contract logic - root cause: other
Execution Speed Precise transaction ordering and timing to exploit the vulnerability within a single atomic block
Obfuscation Plan A strategy to launder and move stolen funds - typically through mixers, cross-chain bridges, or decentralized DEX swaps to resist tracing

What Auditors Should Check

Could this have been caught in audit? Likely — with a thorough Other audit checklist and test coverage
Audited by Audit Report 1 — still lost $42K. Prior audits don't guarantee safety, especially after post-audit code changes.

If you're auditing a protocol with similar architecture to DoraFactory, these are the critical security checks that could have prevented this incident (July 2021).

  • Verify all logic paths related to Other are guarded by proper access controls and input validation
  • Review privileged functions (owner, admin, governance) for potential abuse vectors - centralization risks should be documented and bounded with timelocks or multi-sigs

Master these auditing techniques with hands-on labs and real exploit scenarios in the Smart Contract Hacking course.

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Security Audit History

Sources & References

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